His original UFC 151 opponent and UFC newcomer, Roger Hollett (13-3 MMA, 0-0 UFC), has been forced out of the event, and veteran Vladimir Matyushenko (26-6 MMA, 7-4 UFC) has stepped in to fight Hamill (10-4 MMA, 9-4 UFC) on short notice.

UFC officials today announced the change to the light-heavyweight fight.

UFC 152 takes place Sept. 22 at Air Canada Centre in Toronto. The event’s main card airs on pay-per-view following prelims on FX and Facebook, though it’s not clear where Hamill vs. Matyushenko will be placed on the lineup.

Hamill, who was born deaf but went on to win three NCAA Division III national wrestling championships, retired from MMA following back-to-back losses Quinton “Rampage” Jackson and Alexander Gustafsson in 2011. Prior to the skid, “The Ultimate Fighter 3″ cast member and fan favorite had won five straight fights, which included a controversial disqualification victory over now-champ Jon Jones at the TUF 10 Finale in 2009. It remains the only loss of Jones’ career.

Matyushenko fights for the first time in 2012. Most recently, he suffered a TKO loss to top contender Alexander Gustafsson at UFC 141 in December. Prior to the setback, the 41-year-old “Janitor” was on a 5-1 run that included back-to-back knockout victories over Alexandre Ferreira and Jason Brilz (in just 20 seconds). In fact, since his first two stints in the UFC back in 2003, Matyushenko has quietly amassed a 13-3 record.